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| author | Huacai Chen | 2014-03-21 11:44:02 +0100 |
|---|---|---|
| committer | Ralf Baechle | 2014-03-31 18:17:12 +0200 |
| commit | 1a08f1524d2ee4d4239e56ee1b3f6da0df929563 (patch) | |
| tree | 35e14776ea58a8a99c491479dcd12e0a07cbe256 /arch/mips/loongson/common/mem.c | |
| parent | MIPS: Loongson 3: Add Lemote-3A machtypes definition (diff) | |
| download | kernel-qcow2-linux-1a08f1524d2ee4d4239e56ee1b3f6da0df929563.tar.gz kernel-qcow2-linux-1a08f1524d2ee4d4239e56ee1b3f6da0df929563.tar.xz kernel-qcow2-linux-1a08f1524d2ee4d4239e56ee1b3f6da0df929563.zip | |
MIPS: Loongson: Add UEFI-like firmware interface (LEFI) support
The new UEFI-like firmware interface (LEFI, i.e. Loongson Unified
Firmware Interface) has 3 advantages:
1, Firmware export a physical memory map which is similar to X86's
E820 map, so prom_init_memory() will be more elegant that #ifdef
clauses can be removed.
2, Firmware export a pci irq routing table, we no longer need pci
irq routing fixup in kernel's code.
3, Firmware has a built-in vga bios, and its address is exported,
the linux kernel no longer need an embedded blob.
With the LEFI interface, Loongson-3A/2G and all their successors can use
a unified kernel. All Loongson-based machines support this new interface
except 2E/2F series.
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Signed-off-by: Hongliang Tao <taohl@lemote.com>
Signed-off-by: Hua Yan <yanh@lemote.com>
Tested-by: Alex Smith <alex.smith@imgtec.com>
Reviewed-by: Alex Smith <alex.smith@imgtec.com>
Cc: John Crispin <john@phrozen.org>
Cc: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: linux-mips@linux-mips.org
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/6632
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/loongson/common/mem.c')
| -rw-r--r-- | arch/mips/loongson/common/mem.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/arch/mips/loongson/common/mem.c b/arch/mips/loongson/common/mem.c index 8626a42f5b94..b01d52473da8 100644 --- a/arch/mips/loongson/common/mem.c +++ b/arch/mips/loongson/common/mem.c @@ -11,9 +11,14 @@ #include <asm/bootinfo.h> #include <loongson.h> +#include <boot_param.h> #include <mem.h> #include <pci.h> +#ifndef CONFIG_LEFI_FIRMWARE_INTERFACE + +u32 memsize, highmemsize; + void __init prom_init_memory(void) { add_memory_region(0x0, (memsize << 20), BOOT_MEM_RAM); @@ -49,6 +54,43 @@ void __init prom_init_memory(void) #endif /* !CONFIG_64BIT */ } +#else /* CONFIG_LEFI_FIRMWARE_INTERFACE */ + +void __init prom_init_memory(void) +{ + int i; + u32 node_id; + u32 mem_type; + + /* parse memory information */ + for (i = 0; i < loongson_memmap->nr_map; i++) { + node_id = loongson_memmap->map[i].node_id; + mem_type = loongson_memmap->map[i].mem_type; + + if (node_id == 0) { + switch (mem_type) { + case SYSTEM_RAM_LOW: + add_memory_region(loongson_memmap->map[i].mem_start, + (u64)loongson_memmap->map[i].mem_size << 20, + BOOT_MEM_RAM); + break; + case SYSTEM_RAM_HIGH: + add_memory_region(loongson_memmap->map[i].mem_start, + (u64)loongson_memmap->map[i].mem_size << 20, + BOOT_MEM_RAM); + break; + case MEM_RESERVED: + add_memory_region(loongson_memmap->map[i].mem_start, + (u64)loongson_memmap->map[i].mem_size << 20, + BOOT_MEM_RESERVED); + break; + } + } + } +} + +#endif /* CONFIG_LEFI_FIRMWARE_INTERFACE */ + /* override of arch/mips/mm/cache.c: __uncached_access */ int __uncached_access(struct file *file, unsigned long addr) { |